Centrifugal separator.



No. 703,643. Patented Sept. 9, I902.

.1. P. HULTGBEN.

CENTBIFUGAL SEPABATOR.

(Application filed Mar. 7', 1901.

(No Model.)

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v 4M7a ufw J. BMW MMW I 7 UNITED STATES PATENT OFFICE.

J OHAN PETTER HULTGREN, OF STOOKHOLM, SWEDEN, ASSIGNOR OF ONE- HALF TOFILIP HENRIK GETZMANN, OF STOCKI-IOLM, SWEDEN.

CENTRIFUGAL SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 708,643, datedSeptember 9, 1902.

Application filed March '7, 1901. Serial No. 50,219. (No model.)

To all whom, it may concern.-

Be it known that I, JOHAN PETTER HULT- GREN, a subject of the King ofSweden and Norway, and a resident of Vegagatan 5,Stockholm, Sweden, haveinvented new and useful Improvements in Centrifugal Separators, of whichthe following is a specification, reference being had to the drawingsaccompanying and forming a part hereof.

The present invention relates to improve ments in liners for centrifugalseparatordrums.

The object of the invention is to provide a liner for separator-drumshaving a high efficiency as regards a quick and thorough separation ofthe milk and cream.

The invention relates particularly to such liners for separator-drumswhich consist of a number of rings of suitable cross-section superposedon one another and suitably held together by vertical strips or ribs,said rings leaving between them narrow slits or cracks, through whichthe milk passes on being separated from the cream. The inventionconsists, briefly, in making said rings of oval shape in order tofacilitate the easier sepa ration of the cream and milk, the creamseeking the parts nearest the center and the milk the parts farthestfrom the center.

In order that my invention may be easier understood, I illustrate in theaccompanying drawings an embodiment of the same without limiting myselfto the embodiments shown.

Figure 1 shows a vertical section through a centrifugal vessel providedwith the said partitions. Fig. 2 shows the partitions in a plan view.

Referring to Fig. 1, the partitions are com posed of a number ofrings a,superposed on one another, said rings being seen to bend or curve inwardwhen viewed in section. The rings are suitably held together by verticalstrips or ribs b, to which they are secured in some convenientmanner,either so as to leave narrow slits or apertures d between therings or so that .the rings close tightly together, while holes f areprovided, preferably, at the juncture between the rings. The rings areof oval shape, as seen in Fig. 2, in order that separation may takeplace also on the outer side of the partitions in consequence of thecentrifugal action causing the particles of cream to flow to the partsof the partitions nearer the axis of rotation, while the heavierparticles of water and milk strive to move as far as possible away fromthe axis of rotation. The partitions suitably rest at the bottom on afoot or spider g or the like, being, forcedagainst it by a flange i onthe cover k, which flange bears on a ring Z at the upper end of thestrips b, so that the partitions are firmly held in their properposition. For the introduction of milk may serve in usual manneracentral tube m, which is provided with a number of perforations at thebottom or the like.

The partitions operate in the following manner: On being introduced intothe central tube m the milkfirst rises in usual manner along thepartition-walls both outside and inside. Inside of the partitions milkand cream separate owing partly to the curvature of the rings, partly totheir oval form, the heavier milk striving to move as far as possibleaway from the axis of rotation, and consequently seeking its way intothe hollows formed by the rings, whereas the lighter cream moves inward.The skim-milk passes through the cracks or slits d or perforations f outof the partitions and is discharged in usual manner from the separatorthrough the discharge pipe or, while the cream rising through the upperorifice of the partitions passes off through the aperture 0. The milkrising along the outside of the partitions is separated in the mannerthat the cream flows to the parts of the partitions nearer the axis ofrotation and rising along the latter joins the cream arriving from theinside.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, isp The combination with a centrifugalseparator-drum, of a liner consisting of .a verti- 5 cal series ofrings, each elliptical in crosssection, substantially as and for thepurpose set forth.

In testimony whereof I have signed, my name to this specification in thepresence of two subscribing witnesses.

J OI-IAN PETTER HULTGREN.

Witnesses GUSTAF ISFALT, GIRDA LINDKVIST.

